i know nothing on systems

i dunno what your talking about but all the jvc decks I've had sound just as good as most anything else out there anyway. any deck isn't going to sound that great if you use the internal amp anyway. I had all of my decks running the speakers without a 4 channel amp until awhile ago and they sounded just fine, and actually the JVC's sounded great as long as you don't use that BBE feature. Maybe it was your speakers that were disgusting, or maybe you had a low model JVC deck.....just a thought.